Watch List notes:

Five Pounds 2016 The 90th Birthday of Her Majesty the Queen Platinum Proof Piedfort FDC in the Royal Mint's presentation box with certificate 05 of just 90 minted and only 80 in this style of presentation. Royal Mint issue price £4,500 and the first example of this very rare issue we have seen. 94.2 grams of pure 999 platinum

Estimate: 2000-3000 GBP